Holding and registering hook for color-plates, &amp; c.



PA/TENTED APR. 28 0. H. QUETSGH.

APPLICATION FILED JULY 21, 1902.

HOLDING AND REGISTERING HOOK FOR COLOR PLATES, &0.

N0 MODEL.

orqleggL inn TATFS nrnnir OTTO H. QUETSCH, OF CHICAGO, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 726,572, dated April28, 1903.

Application filed July 21,19Q2.

To aZZ whom it may concern:

Be it known that I, O'rro I-I. QUnTsoH, of Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Holding and Registering Hooks for Oolor-Plates and theLike; and I do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, which form apart of this specification.

This invention relates to improvements in holding and registering hooksfor color or other plates from which impressions are made or printed,and the invention is herein shown as adapted to secure and register onsectional printing-basescolor-plates used in multicolor processprintingfor making colored pictures. 7

The invention consists in the matters hereinafter set forth, and moreparticularly pointed out in the appended claims.

The invention is herein shown as connected with and is adapted for useon sectional bases which are secured flat on horizontal bedpresses, andthe holding and registering hooks are embodied in blocks or casingswhich are of the same general shape and size as the rectangular block ofwhich the base is made.

In the drawings, Figure 1 is a plan view of a sectional base providedwith my improved holding and registering hook, showingcolor-plates'thereon and the manner of securing the plates to the baseby means of said hooks. Fig. 2 is a central longitudinal section of oneof the registering-hooks and the mechanism for actuating the same. Fig.

3 is a longitudinal section thereof, taken in a plane at one side of theview shown in Fig.

2. Fig. 4 is a transverse section of said parts,

taken on line 4.4 of Fig." 3. Fig. 5 is a transverse section thereoftaken on line 5 5 of Fig. 3. Fig. 6is a side View of the device; Fig.

7 is a longitudinal section of a modified form. of the device. Fig. 8is-a transverse-section. thereof taken on line 8 8 of Fig. 7. Fig. 9 is,

a side elevation of the actuating-gear for the hook-slide shown in Figs.7 and 8 removed from its casing or block.

As shown in the drawings, A designates a sectional base consisting of aplurality of Serial No. 116,317. (No model.)

metal blocks which are surrounded and held together by furniture-stripsB, the whole being contained within a chase O and locked therein bymeans of quoius D in a manner familiar with those acquainted with theprinting art.

E Edesignate color-plates which are locked on the base by means ofholding and registering hook devices made in accordance with myinvention.

The device herein shown is adapted more especially for locking upon thebase and registering thereon color-plates which are used inmulticolor-work. In this process of producing colored pictures it isusual to employ in proper successive order three or more differentplates for each picture, each plate printing a distinct color, and inthe printing process a plate containing one of the colors is locked tothe base and an impression taken therefrom, after which said plate isremoved and a second plate looked to the base and an impression takenfrom said second plate, and so on until all of the colors are printed.It is necessary in order to produce acceptable work that the platesbeariugthe several colors after the first plate shall be made toaccurately register with the outlines on the sheet of paper receivingthe impression from the first plate, and it is therefore necessary thatmeans be provided not only for looking the color-plates on the base, butalso for shifting the plates on the base in order to properly registereach succeeding plate with the outlines of the picture produced by theimpression of the first plate. The devices for soholding and registeringthe plates on the base are designated generally by the letter F and areknownin the art as registering-hooks. Said devicesconsist each of ahollow block or casing F, one type of which is shown in Figs. 2 to 6,inclusive. The blocks or casings are made of such exterior form as topermit the same tobelocked in said base between the several blocksthereofand flush therewith in position to properly grasp the color plateor plates. The advantage of makingthe casings or blocks of saidregisteringhooks of the shape shown lies in the fact that the same maybe located at any suitable place in the base and held securely thereinby the clamping devices before referred to, said blocks constitutingsections of the base.

The registering-hooks shown in Figs. 2 to 6 are made as follows: Fdesignates a longitudinally-movable slide, which is movable in ways orguides in the upper face of the block or casing F and is flush at itsupper surface with the upper surface of the block or casing F. Theconnection of the slide with the block is herein shown and is preferablymade dovetail in cross-section. The guide or way of the block or casingextends to the end of the block to permit the slide to be inserted intothe guide or way from the outer end of the block. Said slide is providedon its upper face, at the outer end thereof, with a raisedinwardly-facing hook F which is designed to grip the margin of a plate Ein the manner shown in Fig. 1. Said hook-plate is actuated to move thesame inwardly and outwardly in the block or casing by means of agear-wheel G, which is located in an opening extending transverselyacross the block and is provided with trunnions 9, one of which hasbearing in the side Wall of the block and the other of which has bearingin a removable circular bearing-plate F which is removably seated in oneend of said opening in the manner clearly shown in Fig. 5. The removalof said plate permits the insertion of said gear-wheel G into and itsremoval from the block. Said gear-wheel G meshes with rack-teethf',formed on the lower face of the slide F The gear-wheel is rotated tomove the hook-slide F inwardly and outwardly by the following mechanism.

I-I designates a vertical screw-threaded shaft having at its lower end areduced portion h, which has bearing in an aperture in the lower wall ofthe block F, as shown in Figs. 3 and 4t, and is provided at its upperendwith a similar reduced portion h, which extends through and hasbearing in the removable plate f of the block. Said shaft is insertedinto place or removed therefrom upon removal of the platef. The shaft His screw-threaded with and carries an internally-screw-threaded nut H",which is provided on its side adjacent to the gear-wheel G with teeth7L2, constituting a rack. The outer end of the block is provided with aninwardly-extending recess made of sufficient width to receive the nut H,and said recess intersects the opening which is occupied by thegear-wheel G, whereby the rack on the nut may mesh with the teeth orcogs of the gear-wheel. Upon rotation of the said shaft the nut H byreason of the endwise immovability of the shaft is moved upwardly anddownwardly on the shaft and by by reason of its engagement with thegearwheel G causes said wheel to rotate, the direction of rotationdepending upon the direction of movement of said nut. The reduced upperend h of said shaft is provided with a slot, as shown in Fig. 1, bywhich said shaft may be engaged by any suitable instrument, such as ascrew-driver, to rotate the same.

It will be noted that the actuating-shaft H is located at one side ofthe path of the hookslide F so that the hook may be moved outwardlyentirely to the outer end of the block F or into contact with thesurrounding furniture-strip, whereby the plates held and registered bysaid registering-hooks may extend outwardly into contact with the upperreduced end of the actuating-shaft H. Moreover, said actuating-shaftneed not extend above the plate f, in which it has bearing, so that thecolor-plate may extend outwardly oversaid shaft. The constructionwhereby the actuating-shaft H is located out of line or at one side ofthe path for the registeringhook slide is of considerable importancewhen employing the same in connection with a base adapted to accommodatea plurality of plates thereon, as shown in Fig. 1. When this practice isfollowed, it is desirable from an economic standpoint that the plates belocated as close together at their margins as practicable, for thereason that the margins on the printed sheet between said plates arelost when the pictures are finished and trimmed.

VVith the construction just described, wherein the hooks are made narrowand may be moved outwardly to the outer end of the blocks or casings F,I am enabled to produce a very narrow margin on the sheet between theimpressions, so that the wastage of paper at the margins when thepictures are trimmed is materially reduced as compared with prior formsof holding and registering hooks. It will be understood that in a largepress a number of plates may be placed on one sectional base side toside and end to end and a large number of impressions made at one timeon a single sheet, from which the completed pictures are afterward cut.The saving of the paper at the margins of the pictures therefore becomesa matter of considerable economical importance. Moreover, it oftenoccurs that a given number of pictures may be made on a stock-sheet ofpaper if the margins between the pictures be narrow, whereas a slightwidening of the margin would necessitate the use of a special-size sheetat an increased expense.

In Figs. 7, 8, and 9 are shown a modification of the holding andregistering hook, wherein the gear-wheel I, corresponding .to thegear-wheel G of the previously-described construction, is provided witha worm-wheel I, which is adapted to mesh with a vertical worm-shaft J,located vertically in the casing or block F at one side of the path ofthe hookslide and having bearing therein in the manner shown in Figs. 7and 8. The slide and hook F F respectively, are made the same as shownin the previously-described figures, and the slide is provided on itslower surface with rack-teeth f, which engage the teeth of thegear-wheel I in the manner hereinbefore described.

An important advantage of both of the constructions described is thefacility with which the hook-slides may be moved inwardly and outwardlyand the rapidity with which said books may be engaged with the platesand shifted with respect thereto to properly register the plates. Thisis due to the fact that the actuating screw-shafts are free to beengaged with a screw-driver or like implement, whereby the same may beturned continuously. Moreover, the mechanism is such that the hooks aresusceptible to fine adjustment, so that the adjustment of the hooks maybe readily effected whether it be great orsmall.

It is obvious that changes may be made in the structural details shownwithout departing from the spirit of the invention, and I do not wish tobe limited to such details except ing as hereinafter made the subject ofspecific claims.

I claim as my invention- 1. A holding and registering hook for colorplates and the like comprising, in combination with a casing, ahorizontal slide movable therein and provided on its upper surface witha hook adapted to engage the margin of a plate or the like and on itslower face with a plurality of teeth forming a rack, a horizontalgear-wheel having'bearing in said casing and meshing with said rack, andmeans located at one side of the path of said slide for rotating saidgear-wheel, whereby said hook may be moved outwardly at one side of themanually-operable part which gives motion to the hook.

2. A holding and registering hook for colorplates and the likecomprising, in combination with a casing, a horizontal slide movabletherein and provided on its upper face with a hook adapted to engage themargin of a plate or the like and on its lower face with a plurality ofteeth forming a rack, a horizontal gear-wheel meshing with said rack anda vertical actuating-shaft operatively connected with said gear-wheeland located at one side of the path of said slide, whereby said hook maybe moved outwardly at one side of said actuating-shaft.

3. A holding and registering hook for colorplates and the likecomprising, in combination with a casing, a horizontal slide movabletherein and provided on its upper face with a hook adapted to engage themargin of a plate or the like and on its lower face with a plurality ofteeth forming a rack, a horizontal gear-wheel meshing with said rack anda vertical actuating-shaft operatively connected with said gear-wheeland located at one side of the path of said slide, said shaft extendingupwardly through the casing and being formed at its upper end forengagement with a suitable actuating implement.

4. A holding and registering hook for colorplates and the likecomprising, in combination with a casing, a horizontal slide movabletherein and provided on its upper face with a hook adapted to engage themargin of a plate and on its lower face with a plurality of teethforming a rack, a horizontal gear which meshes with said rack, avertical screwthreaded actuating-shaft which has bearing in said casing,a nut which has screw-threaded engagement with said shaft and is raisedand lowered as the shaft is rotated, and a rack on said nut adapted forengagement with said gear-wheel.

5. A holding and registering hook for colorplates and the likecomprising, in combination with a casing, a horizontal slide movable ina way therein and provided on its upper face with a hook and on itslower face with teeth forming a rack, a horizontal gear-wheel occupyinga transverse opening in said casing and provided with trunnions one ofwhich has bearing with a plate removably fitted in said transverseopening, said gear wheel meshing with said rack and means located at oneside of the path of said slide for rotating said gear-wheel.

6. A holding and registering hook forcolorplates comprising, incombination with a casing, a horizontal slide movable in a way in theupper side of said casing, a horizontal gear-wheel which has bearing insaid casing, a hook on the upper face of said slide, rackteeth on thelower face of the slide which mesh with said gear-wheel, a Verticalactuating shaft operatively connected with said gear-wheel and havingbearing at its lower end in the casing or block and a removable plateattached to the upper side of the block in which the reduced upper endof the shaft has hearing.

In testimony that I claim the foregoing as my invention I affix mysignature, in presence of two witnesses, this 16th day of July, A. D.1902.

OTTO H. QUE'ISOH.

Witnesses:

WILLIAM L. HALL, GERTRUDE BRYCE.

